Has anyone seen our jeeps with a 4btgood cummins swap? Its all mechanical (no ecu) and small, it would provide enough tq, and get great fuel mileage, thoughts? Um just keeping the idea in my head , when I motor finally dies I might try it.the transmission can be pulled from an old dodge, I would see needing a custom drive shaft but once that's donr , it would be stupid simple to set up, get a fuel pump (I fass/air dog)hook it up to the tank, and start it up? I mean getting the sensors etc working would be fun,

Haven't seen it done on a cherokee.... my buddy was going to but never ended up going through with it. It would be pretty badass

its altogethor a pretty dumb idea in my opinion theres a guy on jeepforum.com that put one in a yj and from the last i saw he was having the hardest time figuring out how to make it drive normal...he had to spend hours over custom mounts, springs, what axle ratios you going to do, custom driveshafts, making sure you have clearance everywhere... i mean in a yj it looked relatively simple but in a subframe cherokee that can have problems with frame cracking with abuse and oversize tires where the steerign box is...a 4bt is too much motor and wouldn't be worth it to me...

oh and in between all his struggles with ratios and such he was only getting 20mpg which isn't a very good gain at all a stock cherokee can pull those numbers easily with good treatment

Sounds like would be awesome but alot of work. Prolly too much. Seen plenty of rangers with the cummins swap and it was nasty

There's a few of em. Some vids on YouTube. Would be really cool to do. And run used cooking oil.
A friend of mine and I put a 5cyl 3.0l turbo diesel out of an 85 benz.
Was a lot of work. But he gets almost 30mpg and estimates his fuel cost using cooking oil under .25 cents a gallon.
We are looking in to doing an xj with a 4bt for the next project.
Difficulty is only measured by time, money and ability.
What one may consider hard to do or costly another may find it easy and low cost.
To each his own. And if you want to attempt that project all the more power to ya.

4bt swap would be sweet and Ive seen it in many things. If i had a lead on a cheap motor and trans, I would be all over that. I dont know if i would want to swap it into a XJ, maybe something with a frame

people drop 350's into these jeeps. im pretty sure they can handle a 4bt. Unibody braces would most likely be necessary. I've seen a built 406 (around 750hp) put into a 80s model toyota with a stock frame. if the yota can handle that, im sure the cherokee can handle that small diesel.

lol a 4BT is NOT a small motor, also they arent cheap....

haha X2

compared to the 406, yes it is lol. Also power wise, the 4bt is "small" compared to the 406 im speaking of. Ive seen a 4bt before, i know what they look like. And diesel wise, the 4bt IS small. Compare it to say a 6bt? or maybe a duramax?

lol and your right... not cheap at all.. we was looking for one for a while to go in the 89 we were working on. We wanted to go with a 6bt, but its just too big to fit. The 4bt was too hard to find too so ended up dropping the project lol

I was going to do a 4bt swap into an xj I bought a while back, had the motor bought for $100 still running, bought the jeep for $1000 with 4.5" lift and 36" swampers. But I ended up selling both and making about $1800. Unibody bracing is a must and from the research I done its not really that hard if you know your way around an engine bay. The hardest part is matching tranny's and gear ratios then the speedometer and what not. A 4bt is ROUGHLY the same deminsions as a 350 slightly taller I think but other than that if u got the time money and know how it can be done.

$100???? wow you could have resold it for alot more than you did.. lol

considering I have 2 6bt's in my driveway.....a 4bt is just as tall (TALL!), just shorter. not to mention they weigh about 800lbs or about the weight of a big block.

sure they dont fill an engine bay like a BBC, but it is going to require a pretty good sized lift and/or pan modification.

and just because it doesnt make the power of a 406 or whatever, they still have a alot of torque right off idle and a D30 front wont last long at all.


really not a cost effective swap IMO

sold the 4bt for $700 and the jeep for $1100, I made my money back and some more lol

lol in my opinion no swap is cost effective. I know they're just as tall, a 4bt is basically just a 6bt with with 2 cylinders removed. same as the 2.5 in our jeeps is basically the 4.0 with 2 cylinders removed. Lol and i never said anything about keeping the stock axles. I was merely using the 406 to show how the engine could be fit in. There are plenty of people who have put 4bts in jeeps, both cherokees and wranglers. check youtube lol

Was never trying to be a ***** btw, just trying to say its possible, and not impossibly difficult to fit in.